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Shot-by-shot Spectrum Model for Rod-pinch, Pulsed Radiography Machines [electronic resource].

Published:
Washington, D.C. : United States. National Nuclear Security Administration, 2018.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description:
Article numbers 025,105 : digital, PDF file
Additional Creators:
Los Alamos National Laboratory, United States. National Nuclear Security Administration, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
A simplified model of bremsstrahlung production is developed for determining the x-ray spectrum output of a rod-pinch radiography machine, on a shot-by-shot basis, using the measured voltage, V(t), and current, I(t). The motivation for this model is the need for an agile means of providing shot-by-shot spectrum prediction, from a laptop or desktop computer, for quantitative radiographic analysis. Simplifying assumptions are discussed, and the model is applied to the Cygnus rod-pinch machine. Output is compared to wedge transmission data for a series of radiographs from shots with identical target objects. Resulting model enables variation of parameters in real time, thus allowing for rapid optimization of the model across many shots. “Goodness of fit” is compared with output from LSP Particle-In-Cell code, as well as the Monte Carlo Neutron Propagation with Xrays (“MCNPX”) model codes, and is shown to provide an excellent predictive representation of the spectral output of the Cygnus machine. In conclusion, improvements to the model, specifically for application to other geometries, are discussed.
Report Numbers:
E 1.99:la-ur--17-30436
la-ur--17-30436
Subject(s):
Other Subject(s):
Note:
Published through SciTech Connect.
02/07/2018.
"la-ur--17-30436"
AIP Advances 8 2 ISSN 2158-3226 (Electronic) AM
William Monford Wood.
Funding Information:
AC52-06NA25396
View MARC record | catkey: 24048541